Current Dev State

static/js/ketcher2/node_modules/svg2ttf/lib/math.js

@@ -0,0 +1,54 @@
+'use strict';
+
+function Point(x, y) {
+  this.x = x;
+  this.y = y;
+}
+
+Point.prototype.add = function (point) {
+  return new Point(this.x + point.x, this.y + point.y);
+};
+
+Point.prototype.sub = function (point) {
+  return new Point(this.x - point.x, this.y - point.y);
+};
+
+Point.prototype.mul = function (value) {
+  return new Point(this.x * value, this.y * value);
+};
+
+Point.prototype.div = function (value) {
+  return new Point(this.x / value, this.y / value);
+};
+
+Point.prototype.dist = function () {
+  return Math.sqrt(this.x * this.x + this.y * this.y);
+};
+
+Point.prototype.sqr = function () {
+  return this.x * this.x + this.y * this.y;
+};
+
+/*
+ * Check if 3 points are in line, and second in the midle.
+ * Used to replace quad curves with lines or join lines
+ *
+ */
+function isInLine(p1, m, p2, accuracy) {
+  var a = p1.sub(m).sqr();
+  var b = p2.sub(m).sqr();
+  var c = p1.sub(p2).sqr();
+
+  // control point not between anchors
+  if ((a > (b + c)) || (b > (a + c))) {
+    return false;
+  }
+
+  // count distance via scalar multiplication
+  var distance = Math.sqrt(Math.pow((p1.x - m.x) * (p2.y - m.y) - (p2.x - m.x) * (p1.y - m.y), 2) / c);
+
+  return distance < accuracy ? true : false;
+}
+
+module.exports.Point = Point;
+module.exports.isInLine = isInLine;